Improvement in pumps



@about @Wire ISAAC N. FORRES'I`ER, OF 'BRIDGEPOR CONNECTICUT.

Leam Para: Nason-1o, dated .mw s, 1869.

IMIPROVEMENT IN PUMPS.

i The Scheduleirefen'ed-to in these Letters Patent and making part ofthe same.

(To all whom it ma/y concern Be it known that '1, IsAAoN. Fonnns'rnn, ofthe city of Bridgeport, in the county of' Fairfield, and State ofConnecticut, have invented a new and useful Improvement in-Double-Acting Pumps; andI do, hereby declare that the following is afull, clear, and exact description ofthe construction and operation ofthe same, reference being had tc the accompanying'drawings,

' whichmake a part of' this specification, in which- Figure 1 is alongitudinal section of the pump when ready for use, showing therelative position of the several parts, and the courses of the waterwhen the outside or main cylinder is being moved to the left, or inlthedirection indicated by the dart.

Figure 2 is a like section of the same, showing the relative positionsof the several parts, .and the course of the water when the maincylinder is being moved to the right, or inthe direction indicated bythe dart.

Figure 3 is a perspective View of the inner part of the piston, showingthe two sets of passages through which the wateris forced into it, so asto be passed out through the eduction or discharge-tube.

My improvement-consists in constructing a duplicate piston to operate insuch a manner, that if the inner 'part be held stationary, it will formthe pressurechamber of the pump, while the outer part, or that in whichthe inner part is located and worked, will form the suction orexhaust-chamber of the pu mp,aud will, by its movement in or with themain cylinder, exhaust the induction-tube, t-o ll either end ofthe maincylinder, which,'by its alternate motion, will force the water into thepressure-chamber, and so out through the eductiou or discharge-tube,whichever way the main cylinder maybe moved, so that the pump will hedoubleacting in both senses; that is, double-exhaust and double-force,as`,while the main cylinder moves in either direction, it must exhaustAor suck on one side, and force on the other.

I make the main cylinder A A of cast-iron, or any other suitablematerial, with a hole in the centre of each head, to receive and slideou the two tubes B and 0,with one or both heads made to screw in or on,substantially as represented in section in hgs. l and 2.

I make the outer part of the piston of cast-iron, or

any other suitable material, of a frim or web, as a a,

and two internal rings or anges, as l l and m lm, one of which to beattached by means of a screw, all as represented in figs. 1 and 2, whichI make to it the inside ofthe main cylinder closely, but easily, so thatno packing will be necessary generally.

` I make the inner part ofthe piston of cast-iron, or any other suitablematerial, of considerably less diameter than the outer part, as shown insection in figs. 1 and 2, and make the whole substantially asrepresented in fig. 3.

The tube B may be cast in one piece with the disk e, or be otherwiseattached to it.

I also cast with the disk e, or otherwise attach to it, two or moreshort pipes, as shown at f f, 80o., to join it with the closed partyg.

I cast the tube G in one piece with the disk h, or otherwise attachthem, and I screw this disk h into the rim of the closed vessel g;

' 4I mak, two or more holes, or perforations in this disk, as indicatedat jj,'&c., to receive the water from the upper or right-hand portion ofthe main'cylinder A A, as indicated by the darts n n, 85o., iigs. 1 and3.

Within this closed vessel g,-I place a loose disk, as indicated insection, at i i, figs. l and 2, which will be moved from side to side bythe pressure of the water,

so as to serve as a valve,'to close the holes jj, Snc., in the disk h,as shown in fig. 2, or the ends of the pipes ff, 85o., as shown in iig.I.

In the central part of this disk-valve i t', I make a hole or space, as`indicated, so that it will not obstruct the passage of the water to theeduction-tube C.

Having made the several parts as before described, I drop the disk-valvei i into the pressure-vessel g, and screw iu the disk 71. with its tubeO, when the Whole vwill appear as represented in fig. 3.

I then place this `inner part of the piston into the outer part a a, andscrew in the movable flange, or internal ring l l, igs. 1 and 2, whenthe compound or double-acting piston will be complete, and,'wheninserted into the main cylinder A A, the 'whole will appear as indicatedin section in gs. 1 and 2, and will be ready for use.

I then insert the induction-tube B into the water, as a well, or anyother source, and secure the tubes B and O, so as to hold the inner partof the piston stationary, and apply the motive power to the maincylinder A A, so as to give it a longitudinalreciprocating motion to theproper extent, when; if the cylinder A A is moved downward, or to theleft, in the direction indicated by the dart in tig. 1, the outer part aa of the piston will be moved with it until the ring, or ange 1 Zstrikes the disk h of the inner part, so as to open a to the positionshown in fig'. 1, and force the air into v the pressure-vessel g, and soout through the eduction, or discharge-tube C, as indicated by the dartsn n and o. v

IVhen the main cylinderAA is moved inthe opposite direction, asindicated bythedart in fig. 2, the vacuum will ,be formed inthe upper orright-hand end, andthe outside part a a of the piston will be'carricdwith the main cylinder until its ring, or iange Vm m comes in contactwith the disk e eand thus opens a space or passage between the disk hand the ring, or

. iange l l, as indicated atc c, so that thewater will rush through thetube B around or among the pipes f f, and through the passage c c, intothe upper or right-hand end of the cylinder, as indicated by the dartsdd, yand at the same time the lower or left-hand end will, by closing onthe piston, force the water which it contains into the pipes f f, asindicated by the darts p p, gs. 2 and 3, and thereby force thedisk-valve t' 'i against the disk h, closing the apertures jj', so thatthe water which passes through the pipes ff will pass vthrough g, andout through the discharge-tube O, so that a stream will be constantlyissuing from that tube .This pump may be worked horizontally orvertically, as conveniencemay require, and the main cylinder A A may beheld stationary, and the piston receive the reciprocating motion, but inthat ease a sliding joint would be needed in each of the main tubes;that is,v

in the induction-tube B and the eduction-tube O, so th at the portionofthe induction-tube which is immersed,

and the eduction-tube at the point of discharge, may

f j, disk i t, and main tubes B and O, with the main cylinder A A, whenthey are arranged substantially as herein described and set forth. v

' I. N. FORRESTER.

Witnesses L. P. WATERMAN, R. FITZGERALD.

